Headphone case



FIG. 1 is a front, top, left side perspective view for a headphone case, showing my new design;

FIG. 2 is a front elevational view of FIG. 1 thereof;

FIG. 3 is a rear elevational view of FIG. 1 thereof;

FIG. 4 is a left side elevational view of FIG. 1 thereof;

FIG. 5 is a right side elevational view of FIG. 1 thereof;

FIG. 6 is a top plan view of FIG. 1 thereof;

FIG. 7 is a bottom plan view of FIG. 1 thereof; and,

FIG. 8 is a front left side perspective view for a headphone case of FIG. 1 in a fully open position thereof, the broken line showing of the headphone is included for the purpose of illustrating environment and forms no part of the claimed design. 

CLAIM The ornamental design for a headphone case, as shown and described. 